const std = @import("std");

pub fn build(b: *std.Build) void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    const sqlite_c = b.addTranslateC(.{
        .root_source_file = b.path("src/db/sqlite.h"),
        .target = target,
        .optimize = optimize,
    });
    sqlite_c.linkSystemLibrary("sqlite3", .{});

    const db_mod = b.addModule("db", .{
        .root_source_file = b.path("src/db/root.zig"),
        .target = target,
    });
    db_mod.addImport("sqlite", sqlite_c.createModule());

    const api_mod = b.addModule("api", .{
        .root_source_file = b.path("src/api/root.zig"),
        .target = target,
    });

    const html_mod = b.addModule("html", .{
        .root_source_file = b.path("src/html/root.zig"),
        .target = target,
    });

    const z_mod = b.addModule("z", .{
        .root_source_file = b.path("src/z/root.zig"),
        .target = target,
    });
    z_mod.addImport("html", html_mod);

    const http_mod = b.addModule("http", .{
        .root_source_file = b.path("src/http/root.zig"),
        .target = target,
    });

    api_mod.addImport("http", http_mod);

    const exe = b.addExecutable(.{
        .name = "memora",
        .root_module = b.createModule(.{
            .root_source_file = b.path("src/main.zig"),
            .target = target,
            .optimize = optimize,
            .imports = &.{
                .{ .name = "db", .module = db_mod },
                .{ .name = "api", .module = api_mod },
                .{ .name = "z", .module = z_mod },
                .{ .name = "html", .module = html_mod },
                .{ .name = "http", .module = http_mod },
            }
        }),
    });

    b.installArtifact(exe);

    const run_step = b.step("run", "Run the app");


    const run_cmd = b.addRunArtifact(exe);
    run_step.dependOn(&run_cmd.step);
    run_cmd.step.dependOn(b.getInstallStep());

    if (b.args) |args| {
        run_cmd.addArgs(args);
    }

    const db_tests = b.addTest(.{
        .root_module = db_mod,
    });
    const run_db_tests = b.addRunArtifact(db_tests);
    const db_test_step = b.step("test-db", "Run database tests");
    db_test_step.dependOn(&run_db_tests.step);


    const api_tests = b.addTest(.{
        .root_module = api_mod,
    });
    const run_api_tests = b.addRunArtifact(api_tests);
    const api_test_step = b.step("test-api", "Run api tests");
    api_test_step.dependOn(&run_api_tests.step);


    const z_tests = b.addTest(.{
        .root_module = z_mod,
    });
    const run_z_tests = b.addRunArtifact(z_tests);
    const z_test_step = b.step("test-z", "Run z tests");
    z_test_step.dependOn(&run_z_tests.step);

    const html_tests = b.addTest(.{
        .root_module = html_mod,
    });
    const run_html_tests = b.addRunArtifact(html_tests);
    const html_test_step = b.step("test-html", "Run html tests");
    html_test_step.dependOn(&run_html_tests.step);


    const http_tests = b.addTest(.{
        .root_module = http_mod,
    });
    const run_http_tests = b.addRunArtifact(http_tests);
    const http_test_step = b.step("test-http", "Run http tests");
    http_test_step.dependOn(&run_http_tests.step);


    const exe_tests = b.addTest(.{
        .root_module = exe.root_module,
    });
    const run_exe_tests = b.addRunArtifact(exe_tests);


    const test_step = b.step("test", "Run all tests");
    test_step.dependOn(&run_db_tests.step);
    test_step.dependOn(&run_api_tests.step);
    test_step.dependOn(&run_z_tests.step);
    test_step.dependOn(&run_html_tests.step);
    test_step.dependOn(&run_http_tests.step);
    test_step.dependOn(&run_exe_tests.step);


    const fmt_step = b.step("fmt", "Format");
    const do_fmt = b.addFmt(.{
        .paths = &.{ "src" },
    });
    fmt_step.dependOn(&do_fmt.step);


    const check_fmt_step = b.step("check", "Check format and syntax");
    const do_check_fmt = b.addFmt(.{
        .paths = &.{ "src" },
        .check = true,
    });
    check_fmt_step.dependOn(&do_check_fmt.step);


    const docs_step = b.step("docs", "Emit documentation");
    const docs_install = b.addInstallDirectory(.{
        .install_dir = .prefix,
        .install_subdir = "docs",
        .source_dir = exe.getEmittedDocs(),
    });
    docs_step.dependOn(&docs_install.step);


    const hot_cmd = b.addSystemCommand(&.{
        "sh",
        "-c",
        "clear; echo 'building in hot mode'; find src -type f | entr -r zig build run",
    });

    const hot_step = b.step("hot", "Run server in hot reload mode");
    hot_step.dependOn(&hot_cmd.step);
    run_cmd.step.dependOn(b.getInstallStep());
}